For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningInterior Trim and Paneling
Specifications
Front Side Door Window Switch Bezel Replacement
Preliminary Procedure
Remove the front side door trim. Refer to Front Side Door Trim Replacement.
Front Side Door Window Switch Bezel Screw (Qty: 8)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
...
Servicing the Airbag-Equipped Vehicle
Airbags affect how the vehicle should be serviced. There are parts of the airbag
system in several places around the vehicle. Your dealer and the service manual
have information about servicing the vehicle and the airbag system.
WARNING
For up to 10 seconds after the vehicle is turned off and ...
Driver or Passenger Seat Back Cushion Cover and Pad Replacement
Removal Procedure
Warning: Refer to SIR Warning in the Preface section.
Warning: Replace the passenger presence system as a complete assembly to prevent
possible injury to the occupant. The bladder, the
pressure sensor, the seat cushion, and the control module are assembled and
calibrated a ...